The full list of projects contains the entire database hosted on this portal, across the available directories. The projects and activities (across all directories/catalogs) are also available by country of origin, by geographical region, or by directory.

Displaying: 81 - 96 of 96
81. Late Quaternary paleoceanography of the Denmark Strait Overflow Pathway

The global thermohaline circulation is driven by sinking of cold, dense surface waters in the Greenland and Norwegian Seas and its replacement by warmer surface water from lower latitudes. This global circulation system, the conveyor belt, is the main regulator of global climate. Even slight disturbances of this delicate system will cause significant climate changes, especially for NW Europe. While the current hydrographical situation and associated overflow pathways are well-documented, paleoceanographic studies of the Greenland and Faroe/Shetland (F/S) overflow pathways are still scarce. The F/S pathway is presently the subject of study of the MAST program (ENAM project). This project focusses on the late Quaternary overflow history of the important East Greenland pathway. High resolution multichannel sleevegun seismic data recently collected by the Geological Survey of Greenland and Denmark (GEUS) allowed identification of suitable box- and piston-coring sites. Results from the high-resolution cores, allowing direct correlation with regional atmospheric changes documented in the Greenland ice-cores will provide new information on causes and mechanisms of climate change. The continental slope and rise off SE-Greenland can be considered as a potential key area for paleoceanographic and paleoclimatic studies, since: 1) The area is located in the immediate vicinity of the Denmark Strait arctic gateway for water mass exchange between the Arctic and Atlantic ocean. Recent hydrographic measurements (Dickson 1994) demonstrate the important role of the area with regard to hydrographic processes contributing to the formation of NADW. 2) The seafloor morphology and information from multichannel seismic recording shows the presence of numerous large detached sediment drifts and other drift-related features, which will provide important paleoceanographic information as outlined before. 3) The distribution and architecture of the sediment drifts is also affected by down-slope processes transporting upperslope/shelf sediments of mainly glacial origin. Thus the area offers an unique opportunity to study the sediment drifts both with regard to the (paleo)oceanic flow regime and the climatically-inherited signal from the down-slope sediment input. Research activities: All research is directed towards documentation of high resolution natural climate variability during the late Quaternary. Separate topics include: 1. Seismic/sidescan sonar studies 2. High resolution quantitative micropaleontology (planktonic/benthic foraminifera, diatoms, calcareous nannoplankton, dinoflagellates) 3. High resolution stable oxygen/carbon isotope studies 4. DNA studies on planktonic foraminifera (with University of Edinburgh)

Climate variability Climate Climate change Oceanography Ice cores micropaleontology Ocean currents paleoceanography
82. Climate development in Polar areas during the last 1000 years

This project studies the climate development in polar areas during the last 400 years using the results of pollen analysis of soil samples collected in the Arctic regions, and written information collected in Dutch archives. Dutch sailors were sailing in Arctic waters already long before Willem Barentsz tried to find the northeast passage to China and India in the 1590s. They reported their observations to their principals and these reports are sometimes preserved. In this way written sources with much information about may aspects of the Atlantic Arctic are kept in reports in the Dutch archives. In these reports valuable information about the weather in the last 400 years is registered and also if serial these data can be interpreted as climate information. In combination with the information of the pollendiagrams of the collected soil samples, it will be possible to reconstruct the climate development in the Arctic in the last 400 years.

Soils Climate variability paleoclimatology Climate Climate change
83. Zooplankton monitoring in the Norwegian Sea

Monitor the abundances of zooplankton at two transects along the coast 4-8 times a year, and in the Norwegian Sea in May and July-August

Climate variability Oceanography zooplankton
84. Monitoring the Atlantic inflow to the Barents Sea

To monitor the inflow of salt and heat to through the Barents Sea to the Arctic Ocean.

Climate variability Climate change
85. Monitoring climate variability in the Barents Sea

This is an ongoing activity for monitoring variability in temperature and salinity in Barents Sea

Climate variability Climate change Oceanography
86. Variation in space and time of cod and other gadoids: the effect of climate and density dependence on population dynamics

To increase the understanding of temporal and spatial dynamics of cod and other commercial gadoid species, including the influence of environmental variability on population parameters, and make this knowledge available in assessable form for fisheries management.

Climate variability Climate change
87. Trajectories of Marine Ecosystem Response to Arctic Climate Change: A Barents-Bering Sea Comparison

Multi-institutional, international cooperative project to determine the possible responses of Arctic marine communities to future global climate change by comparing retrospective patterns in benthic composition and distributions to past climatic events in the Barents and Bering Seas.

Biological effects Climate variability Spatial trends Contaminant transport Climate change Biodiversity Food webs Temporal trends Ecosystems
88. Ice-sheet mass balance in central West Greenland

The aim of the project is to obtain more insight in the response of the Greenland ice sheet to climatic change. For this purpose we will link our surface energy-balance model to an atmospheric model, so that the model can be forced by variables characterizing the atmosphere outside the thermal influence of the ice sheet itself. The modelling is supported by the mass-balance and meteorological data that we collect along a transect in West Greenland (the Kangerlussuaq-transect or K-transect). The albedo of the ice sheet is studied by means of satellite data and measurements obtained from a helicopter. Research activities - develop numerical models of the surface energy balance and the boundary layer above the ice sheet - perform annual measurements of the mass balance and ice velocity along the K-transect - maintain two automatic weather stations along the K-transect - study the surface albedo by means of remote-sensing images - improve methods to retrieve the surface albedo from satellite data by means of measurements obtained from a helicopter

mass balance Geophysics Climate variability Climate meteorology surface albedo Climate change Ice Ice sheets
89. Polar Exchange at the Sea Surface (POLES)

Our broad area of enquiry is the role of polar regions in the global energy and water cycles, and the atmospheric, oceanic and sea ice processes that determine that role. The primary importance of our investigation is to show how these polar processes relate to global climate.

Atmospheric processes polar cloud dynamics ice dynamics surface radiation and cloud forcing Climate variability Climate Sea ice Climate change surface heat and mass balance polar atmospheric processes ice-ocean models arctic climate Modelling Ice Oceanography Arctic SEARCH Atmosphere Ocean currents cryosphere ice thickness
90. Arctic Research Initiative

Research in the NOAA OAR Arctic Research Office Activities Supported by Base Funds in FY2000 Joint IARC/CIFAR Research In FY2000, the NOAA Arctic Research Office developed a partnership with the National Science Foundation and the International Arctic Research Center at the University of Alaska to conduct a research program focused on climate variability and on persistent contaminants in the Arctic. This partnership resulted from a unique confluence of mutual interest and unexpected funding that NSF chose to obligate through NOAA because of NOAA's on-going joint programs at the University of Alaska. NSF anticipates establishing its own institutional arrangement with the University of Alaska in the future. The research initiated in FY2000 focused on 5 climate themes and 1 contaminant theme, with several specific topics associated with each: A. detection of contemporary climate change in the Arctic changes in sea ice role of shallow tundra lakes in climate comparison of Arctic warming in the 1920s and the present variability in the polar atmosphere dynamics of the Arctic Oscillation downscaling model output for Arctic change detection long-term climate trends in northern Alaska and adjacent Seas B. Arctic paleoclimate reconstructions drilling in the Bering land bridge Arctic treeline investigation Mt. Logan ice core test models to simulate millennial-scale variability C. Atmosphere-ice-land-ocean interactions and feedbacks impact of Arctic sea ice variability on the atmosphere model-based study of aerosol intrusions into the Arctic international intercomparison of Arctic regional climate models reconstruction of Arctic ocean circulation intercomparison of Arctic ocean models Arctic freshwater budget variation in the Arctic vortex role of Arctic ocean in climate variability Arctic Oscillation and variability of the upper ocean D. Arctic atmospheric chemistry assessment of UV variability in the Arctic Arctic UV, aerosol, and ozone aerosols in the Finnish Arctic inhomogeneities of the Arctic atmosphere aerosol-cloud interactions and feedbacks Arctic haze variability E. Impacts and consequences of global climate change on biota and ecosystems in the Arctic linking optical signals to functional changes in Arctic ecosystems marine ecosystem response to Arctic climate changes faunal succession in high Arctic ecosystems long-term biophysical observations in the Bering Sea cryoturbation-ecosystem interactions predicting carbon dioxide flux from soil organic matter F. Contaminant Sources, Transport, Pathways, Impacts using apex marine predators to monitor climate and contamination change trends in atmospheric deposition of contaminants assessment of data on persistent organic pollutants in the Arctic paleorecords of atmospheric deposition derived from peat bog cores toxicological effects of bio-accumulated pollutants Under these themes, 45 research projects were initiated that will continue into 2001. The support for these projects totals $8 million over two years, of which only $1 million comes from NOAA. This tremendous leverage cannot be expected to continue; however the Arctic Research Office will continue its interactions with the International Arctic Research Center and seek collaborative efforts whenever possible. Arctic Climate Impact Assessment The United States has agreed to lead the other seven Arctic countries to undertake an Arctic Climate Impact Assessment (ACIA). This assessment will culminate in 2002 with a peer-reviewed report on the state of knowledge of climate variability and change in the Arctic, a set of possible climate change scenarios, and an analysis of the impacts on ecosystems, infrastructure, and socio-economic systems that might result from the various climate change scenarios. NOAA and NSF will provide support in FY2000, with the ARO providing early support and leadership for planning the ACIA. Scientific Planning and Diversity The Arctic Research Office will support scientific planning, information dissemination, and NOAA's diversity goals through workshops and other activities. An international conference on Arctic Pollution, Biomarkers, and Human Health will be held in May, 2000. The conference is being organized by the National Institutes of Environmental Health Sciences, with co-sponsorship by NSF and the Arctic Research Office. Research planning activities are being supported that will lead to future program activities related to climate variability and change and to impacts from contamination of the Arctic. The Study of Environmental Arctic Change (SEARCH) is being planned on an interagency basis, with the Arctic Research Office providing input for NOAA. An Alaskan Contaminants Program (ACP) is under development, with leadership coming from organizations within the state of Alaska. To accelerate the flow of minorities into scientific fields of interest to NOAA, the Arctic Research Office will undertake an effort in conjunction with Alaskan Native organizations that will encourage young Native students to obtain degrees in scientific fields. Outlook to FY2001 The Arctic Research Office will use resources available on FY2001 to begin implementation of the interagency Arctic climate science plan "Study of Environmental Arctic Change" (SEARCH). The NOAA/ARO role in SEARCH will involve long-term observations of the ocean, atmosphere and cryosphere, improved computer-based modeling of climate with an emphasis on the Arctic, and diagnostic analysis and assessment of climate data and information from the Arctic. Funds available in FY2001 will permit planning and limited prototype observation and modeling activities. The role of the NOAA/ARO in the Alaska Contaminants Program will become during the last half of FY2000, and some initial activities may be undertaken in FY2001. In addition, the NOAA/ARO will continue its partial sponsorship of the Arctic Climate Impact Assessment, being pursued on an international basis with the involvement of all 8 Arctic countries. It is anticipated that the ARO will provide support to experts to produce portions of the draft state-of-knowledge report during FY2001 and conduct one or more review workshops.

Biological effects Atmospheric processes Climate variability Contaminant transport Climate change Arctic Persistent organic pollutants (POPs) SEARCH
91. The Role of Polar Oceans in Contemporary Climate Change

Our central geophysical objective is to determine how sea ice and the polar oceans respond to and influence the large-scale circulation of the atmosphere. Our primary technical objective is to determine how best to incorporate satellite measurements in an ice/ocean model.

Atmospheric processes ice dynamics mass balance of Arctic sea ice Geophysics Climate variability Climate Sea ice Climate change freshwater balance of the Arctic Ocean polar atmospheric processes ice-ocean models arctic climate Modelling Ice Oceanography Arctic SEARCH Atmosphere Ocean currents ice thickness
92. A 30-Year Sea Ice Data Set from Satellite Microwave Radiometers

The project consists of two parts: the generation of a data set of sea ice extents and areas, and associated scientific analyses. The objective of the first part is to produce a 30-year, research quality sea ice data set for climate change studies. The data set will build on an existing 18-year data set derived from satellite passive-microwave observations and currently archived at the National Snow and Ice Data Center in Boulder, CO. We will extend this data set by using historical data from the 1970's from the National Ice Center and new data from DMSP Special Sensor Microwave Imagers and the upcoming EOS-PM Advanced Microwave Scanning Radiometer. These data sets will be cross-calibrated to ensure a consistent 30-year data set following methods developed earlier and based on matching the geophysical parameters during periods of sensor overlap. The principal products will be Arctic and Antarctic sea ice extents and areas, derived from sea ice concentration maps. The second part of the proposal will center on the analysis and use of the 30-year data set. The science objectives are (1) to define and explain the hemispheric, regional, seasonal, and interannual variabilities and trends of the Arctic and Antarctic sea ice covers and (2) to understand any observed hemispheric asymmetries in global sea ice changes. Hemispheric sea ice cover asymmetries have been found in the existing 18-year record and have also been suggested from some model experiments simulating future conditions assuming a gradual increase in atmospheric CO2. We will examine the proposed 30-year record to determine the degree and nature of the hemispheric asymmetry in it and to place the sea ice observations in the context of other climate variables through comparisons with simulations from the NOAA Geophysical Fluid Dynamics Laboratory and Hadley Centre climate models.

Climate variability Climate Sea ice Arctic SEARCH
93. Program for Arctic Regional Climate Assessment (PARCA)

The Program for Arctic Regional Climate Assessment (PARCA) was formally initiated in 1995 by combining into one coordinated program various investigations associated with efforts, started in 1991, to assess whether airborne laser altimetry could be applied to measure ice-sheet thickness changes. It has the prime goal of measuring and understanding the mass balance of the Greenland ice sheet, with a view to assessing its present and possible future impact on sea level. It includes: · Airborne laser-altimetry surveys along precise repeat tracks across all major ice drainage basins, in order to measure changes in ice-surface elevation. · Ice thickness measurements along the same flight lines. · Shallow ice cores at many locations to infer snow-accumulation rates and their spatial and interannual variability, recent climate history, and atmospheric chemistry. · Estimating snow-accumulation rates from atmospheric model diagnosis of precipitation rates from winds and moisture amounts given by European Centre for Medium-Range Weather Forecasts (ECMWF) operational analyses. · Surface-based measurements of ice motion at 30-km intervals approximately along the 2000-m contour completely around the ice sheet, in order to calculate total ice discharge for comparison with total snow accumulation, and thus to infer the mass balance of most of the ice sheet. · Local measurements of ice thickness changes in shallow drill holes ("dh/dt" sites in Figure 1). · Investigations of individual glaciers and ice streams responsible for much of the outflow from the ice sheet. · Monitoring of surface characteristics of the ice sheet using satellite radar altimetry, Synthetic Aperture Radar (SAR), passive-microwave, scatterometer and visible and infrared data. · Investigations of surface energy balance and factors affecting snow accumulation and surface ablation. · Continuous monitoring of crustal motion using global positioning system (GPS) receivers at coastal sites.

ablation Glaciers regional climate mass balance Climate variability accumulation remote sensing Climate change Ice Ice sheets Ice cores glaciology Greenland ice sheet SEARCH
94. Swedish Regional Climate Modelling Programme (SWECLIM)

It has become clear in recent years that a changing composition of the atmosphere due to human activities may influence the climate system. The production of greenhouse gases and their accumulation in the atmosphere can result in a global warming and changes in the climate system. On regional scales, this may result in even much more pronounced changes. This is particularly true for the high northern latitudes. Climate changes will impact the society and nature in many ways. The anticipated effects are large and will matter both globally (mainly negative consequences) and regionally (both negative and positive consequences). SWECLIM provides users with detailed regional climate study results. SWECLIM develops regional (limited area) climate system modeling, studies climate processes and feedback special for the Nordic region and creates regional climate (change) scenarios on a time scale of 50-100 years. SWECLIM also performs impact studies on water resources. Climate scenarios are also made available for other impact studies, such as in forestry, done by external groups. Information activities on climate change and the regional consequences are an important component in the program. The regional climate model system is built around a regional atmospheric model, regional ocean models with sea ice for the Baltic Sea and land surface modeling plus hydrology. The model system is forced at the by large-scale results from global climate models. Multi-year to multi-decade length integrations are performed with the regional model targeting a domain roughly centered on the Nordic countries and using horizontal resolutions ranging from 20-80 km.

Atmospheric processes Climate variability Climate Sea ice Climate change Atmosphere Temporal trends
95. Application of Ground-based remote sensing to Arctic climate research

This research consists of eight projects. 1. Climate-related remote sensing of clouds. A project to extend and test innovative techniques for observing cloud microphysical properites from ground-based cloud radar, lidar, and radiometers (P.I. Brooks Martner +1-303-497-6375) 2. Ground-based and remote sensing of microphysical and radiative properties of Arctic clouds. This project involves data analysis of radar, lidar, and radiometer data from the FIRE-III Arctic Cloud Experiment, including in situ validation with aircraft, and development of retrieval techniques of cloud microphysical properties from satellite data. (P.I. Taneil Uttal, +1-303-497-6409) 3. Deployment of surface based, active remote sensors during SHEBA. Data collected in 1997-1998 will be analyzed to provide information on cloud boundaries, radar reflectivities, radar Doppler velocities, lidar depolarization ratios, and lidar backscatter. (P.I. Taneil Uttal, +1-303-497-6409) 4. Validation of CERES cloud retrievals over the Arctic with surface-based millimeter-wave radar. The goal is to provide long-term data sets to validate satellite data from the CERES package on the TERRA satellite. (P.I. Taneil Uttal, +1-303-497-6409) 5. Development of an integrated sounding system in support of the DOE/ARM program. Microwave and millimeter wave radar data sets are being collected to study water vapor and Arctic clouds under Arctic winter conditions. (P.I. Ed Westwater, +1-303-497-6527) 6. Application of Kalman filtering to derive water vapor profiles from combined ground-based sensors. The goal is to improve calibration methods for the ARM microwave radiometers. (P.I. Ed Westwater, +1-303-497-6527) 7. Meltpond 2000. The goal is to use aircraft-based radiometers to obtain the first high spatial resolution microwave images of polynas to improve the interpretation of SSM/I and SSMIS imagery of Arctic ice. (P.I. Al Gasiewski, +1-303-497-3577) 8. Arctic atmospheric radiation studies. This collaboration with the Japanese Communications Research Laboratory provides for ground-based measurement of ozone, water vapor and cloud radiation. (P.I. Joe Shaw, +1-303-497-6496)

Atmospheric processes Climate variability SEARCH Atmosphere
96. Atmospheric Radiation Measurement (ARM) Program

The North Slope of Alaska/Adjacent Arctic Ocean Cloud and Radiation Testbed (CART) site is providing data about cloud and radiative processes at high latitudes. These data are being used to refine models and parameterizations as they relate to the Arctic. The NSA/AAO site is centered at Barrow and extends to the south (to the vicinity of Atqasuk), west (to the vicinity of Wainwright), and east (perhaps to Oliktok). The Adjacent Arctic Ocean was probed by the Surface Heat Budget of the Arctic (SHEBA) experiment, a multi-agency program led by the National Science Foundation and the Office of Naval Research. SHEBA involved the deployment of an instrumented ice camp within the perennial Arctic Ocean ice pack that began in October 1997 and lasted for 12 monthsB. For the planning period covered here, a major focus will be on completing the facilities at Atqasuk, 100 km inland from Barrow. Presently, the instrumentation shelters are located on a gravel pad turn-around at the end of a dead end road between the town of Atqasuk and its airport. To comply with the terms of our land lease, we will construct a platform on pilings adjacent to the gravel pad and move the shelters off the roadway and onto the platform. The platform will permit long-term deployment of the Atqasuk instrumentation in a manner very similar to that at Barrow. Sky radiation (SKYRAD) radiometric instrumentation will be mounted above the level of the roof of the shelters so as to avoid shadowing, and the ground radiation (GNDRAD) instrumentation will be mounted on a tip tower such as the one about to be installed at Barrow. At Atqasuk, during the CY 2000 melt season, the science team heat flux study begun during the CY 1999 melt season will resume in spring with the redeployment of a laser scintillometer. In addition, heat flux measurements will begin near Barrow on the shore of the Beaufort Sea in the same time frame. Also at Barrow, a mini-IOP is planned during spring 2000 that will bring together two extended-range atmospheric emitted radiance interferometers (ER-AERIs) (including the one permanently installed at Barrow), one normal range downward-looking AERI (for snow characterization), and one or two other extended-range upward-looking Fourier transform infrared spectrometers (FTIRs). Various other less major enhancements will be made to the instrumentation suites of both Barrow and Atqasuk. Both facilities, however, will continue to be strongly focused on Instantaneous Radiative Flux (IRF) experiments for this planning period. A Single-Column Model (SCM) experiment utilizing either subscale or full scale aircraft that had been proposed for the NSA/AAO for CY2000 will be put off for a year.

Climate variability Climate Climate change SEARCH